Temporal variations in black carbon in the Yangtze River Delta of China: Long-term observations and trends under different pollution processes
Atmospheric Research,
Год журнала:
2025,
Номер
unknown, С. 108067 - 108067
Опубликована: Март 1, 2025
Язык: Английский
Influence of Black Carbon on Measurement Errors in Scattering-Based Visibility Meters
Atmosphere,
Год журнала:
2025,
Номер
16(4), С. 467 - 467
Опубликована: Апрель 17, 2025
Visibility
is
a
fundamental
meteorological
parameter
critical
for
surface
transportation,
aviation,
maritime
navigation,
and
weather
process
investigation.
Scattering
visibility
meters
are
extensively
utilised
their
simple
design
rapid
response;
however,
measurement
principle
inherently
limited,
as
they
only
quantify
the
scattering
coefficient
without
assessing
absorption
coefficient,
potentially
causing
errors.
The
World
Meteorological
Organisation
(WMO)
posits
that
atmospheric
usually
relatively
small
can
be
neglected,
justifying
approximation
of
extinction
by
coefficient.
However,
black
carbon
predominant
light-absorbing
component
in
atmosphere,
an
increase
its
mass
concentration
markedly
alters
considerably
impacting
accuracy
scattering-based
meters.
Based
on
Mie
theory
incorporating
both
field
observations
laboratory
data,
we
systematically
examined
effects
interactions
with
other
aerosol
components
errors
Our
findings
revealed
impact
substantial,
under
certain
conditions,
particularly
pronounced.
This
influence
not
dependent
but
also
closely
associated
size
distribution,
mixing
state,
characteristics
aerosols.
Due
to
spatiotemporal
variability
these
factors,
uncertain.
Therefore,
during
calibration
meters,
factors
must
considered
enhance
accuracy.
We
propose
recommendations
aimed
at
reducing
improving
assessments.
Язык: Английский
Comparative assessment of acute neurotoxicity of real-world ultra-fine black carbon emitted from residential solid fuel combustion
The Science of The Total Environment,
Год журнала:
2024,
Номер
954, С. 176597 - 176597
Опубликована: Сен. 28, 2024
Язык: Английский
UV Light Absorption at 370 nm by Mineral Dust, Organic Carbon, and Elemental Carbon in the Himalayas and Tibetan Plateau
Atmospheric Environment,
Год журнала:
2024,
Номер
334, С. 120709 - 120709
Опубликована: Июль 20, 2024
Язык: Английский
Analysis of the Influencing Factors and Sources of Brown Carbon Light Absorption in a Typical Megacity of the Yangtze River Delta, China
Atmosphere,
Год журнала:
2024,
Номер
15(4), С. 421 - 421
Опубликована: Март 28, 2024
Brown
carbon
(BrC)
is
a
new
term
for
organic
aerosol
(OA)
with
strong
absorption
ability
from
the
visible
to
ultraviolet
(UV)
wavelengths,
which
plays
vital
role
in
atmospheric
visibility
and
climate
change.
Herein,
we
report
field
measurements
1
March
2020
28
February
2021,
sampled
at
urban
Suzhou,
Yangtze
River
Delta
(YRD),
China,
investigate
optical
properties
sources
of
BrC.
By
analyzing
seasonal
characteristics
BrC
370
nm
(babs370),
babs370
was
found
be
highest
(9.0
±
7.2
Mm−1)
winter
lowest
(5.1
3.3
summer,
respectively.
The
Ångström
exponent
(AAE)
value
1.22
0.05,
followed
by
1.21
1.20
1.19
0.05
fall,
spring,
mass
cross-section
(MAC)
secondary
(SOC)
0.2
m2g−1
2.9
0.1
4.3
2.8
winter,
significantly
lower
than
that
primary
(POC)
nm,
suggesting
aging
process
could
weaken
light
Five
different
factors
were
identified
positive
matrix
factorization
(PMF)
analysis,
including
biomass-burning-related,
vehicle-related,
sulfate-related,
nitrate-related,
dust-related
factors,
on
average
account
7.4%,
73.4%,
11.9%,
1.9%,
5.4%
babs370,
Potential
Source
Contribution
Factor
(PSCF)
analysis
showed
those
high
periods
mainly
contributed
air
south.
Moreover,
influence
degree
potential
source
areas,
sequence
>
spring
fall
summer.
Our
results
improve
understanding
an
important
industrial
city
YRD,
reduce
uncertainty
prediction
its
effect
this
region.
Язык: Английский